Suppose u and v are differentiable functions of x. Use the given values of the functions and their derivatives to find the value of the indicated derivative.u(1) = 3, u '(1) = -6, v(1) = 6, v '(1) = -2.
(2u - 4v) at x = 1
A. 30
B. -18
C. -20
D. -4
Answer: D
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Solve the problem.Consider the area of the region in the first quadrant enclosed by the curve y = 
cosh 9x, the coordinate axes, and the line x = 9. This area is the same as the area of a rectangle of a length s, where s is the length of the curve from 
to 
What is the height of the rectangle?
A. sinh 81
B. 9
C. 
sinh 81
D. 
What part of the object or set of objects is shaded?
A. 
B. 
C. 
D. 
Find the approximate equation of the line that passes through the two points. Write the equation in slope-intercept form. Round the slope and the constant term to two decimal places.(2.8, 5.7) and (4.6, 3.1)
A. y = 1.44x + 1.66 B. y = 2.04x + 0.67 C. y = -0.69x + 7.64 D. y = -1.44x + 9.74
Find the indicated intersection or union.{v, w, x, y, z} ? {q, s, y, z}
A. {s, u, w} B. {q, s, u, v, w, x, y} C. {s, u, v, w, x, z} D. {q, s, v, w, x, y, z}